Doctor Who: The Space Museum / The Chase

The Space Museum
The TARDIS jumps a time track and the travellers arrive on the planet Xeros. There they discover their own future selves displayed as exhibits in a museum established as a monument to the galactic conquests of the warlike Morok invaders who now rule the planet. When time shifts back to normal, they realise that they must do everything they can to try to avert this potential future.
Vicki helps the native Xerons to obtain arms and thereby to revolt against the Moroks. The revolution succeeds and the travellers go on their way, confident that the future has been changed.

The Chase
The travellers are forced to flee in the TARDIS when they learn from the Time/Space Visualiser taken from the Moroks' museum that a group of Daleks equipped with their own time machine are on their trail with orders to exterminate them.
The chase begins on the desert planet Aridius and takes in a number of stopping-off points including the observation gallery of New York's Empire State Building, the 19th Century sailing ship Mary Celeste (the Daleks' appearance causing all the crew and passengers to jump overboard) and a spooky haunted house which, although the Doctor and his friends do not realise it, is actually a futuristic fun-fair attraction.
Eventually both time machines arrive on the jungle planet Mechanus, where the Daleks try to infiltrate and kill the Doctor's party using a robot double of him. The travellers are taken prisoner by the Mechonoids - a group of robots sent some fifty years earlier to prepare landing sites for human colonists who, in the event, never arrived - and meet Steven Taylor, a stranded astronaut who has been the Mechonoids' captive for the past two years.
The Daleks and the Mechonoids engage in a fierce battle which ultimately results in their mutual destruction, and the Doctor's party seize this opportunity to escape. The Doctor reluctantly helps Ian and Barbara to use the Daleks' time machine to return home.

The Space Museum

Directed by Mervyn Pinfield
Written by Glyn Jones
Produced by Verity Lambert
Title Music by Ron Grainer and the BBC Radiophonic Workshop, arranged by Delia Derbyshire
Film Editing by
Costume Design by Daphne Dare, Tony Pearce

The Chase

Directed by Richard Martin
Written by Terry Nation
Produced by Verity Lambert
Title Music by Ron Grainer and the BBC Radiophonic Workshop, arranged by Delia Derbyshire
Film Editing by Norman Matthews
Costume Design by Daphne Dare

The Space Museum
In a nice piece of continuity, William Russell starts gently banging his fists together as he leaves the TARDIS interior set and carries this through to the next scene, following a recording break, as he emerges from the police box onto the Xeros surface set; this gives the effect of a continuous piece of action, and helps maintain the illusion that the TARDIS interior really is inside the police box shell.
Some of the tables from the Sensorite city (in The Sensorites) turn up in the Moroks' museum.
Jeremy Bulloch, now better known for his role as Boba Fett in the Star Wars films The Empire Strikes Back and Return of the Jedi, plays Tor. He would later appear in the season eleven story The Time Warrior.
The Doctor's only appearance in the third episode is in the opening reprise from the second, as William Hartnell was on holiday during the week in which it was recorded.
There is an amusing scene in which the Doctor hides inside a Dalek casing - an exhibit in the Moroks' museum.
During the sequence in which Lobos tries to interrogate the Doctor using a machine that displays his prisoner's thoughts on a screen, the Doctor feeds the device a series of amusing false images, including a photograph of himself wearing a Victorian bathing costume.
The incidental music used came from stock recordings rather than being specially composed.

The Chase
The Daleks sport a slightly modified design, complete with 'solar panel' slats around their shoulder sections.
Stock film from Top of the Pops of the Beatles singing 'Ticket to Ride' in the Time/Space Visualiser scene is utilised in the first episode - this was in lieu of a planned live appearance by the 'fab four' made up as old men, which was vetoed by their manager Brian Epstein.
Distinguished actor Hywel Bennett features in an early role as the Aridian Rynian.
There are a number of instances of the Daleks being sent up - most notably in the depiction of a 'thick' Dalek barely able to complete a sum.
There are some adapted cinema film Daleks - and, inadvertently, a studio camera - lurking in the foliage of Mechanus.
The Chase was hastily commissioned from Terry Nation when another of his stories, apparently a revival of his abandoned season one historical The Red Fort, fell through.
The film inserts of Ian and Barbara celebrating their return to Earth were made as part of the film shoot for the following story, The Time Meddler, and so were the responsibility of that story's director Douglas Camfield and designer Barry Newbery.